| /* |
| * Copyright (c) 2012 The WebRTC project authors. All Rights Reserved. |
| * |
| * Use of this source code is governed by a BSD-style license |
| * that can be found in the LICENSE file in the root of the source |
| * tree. An additional intellectual property rights grant can be found |
| * in the file PATENTS. All contributing project authors may |
| * be found in the AUTHORS file in the root of the source tree. |
| */ |
| |
| #include "webrtc/modules/audio_coding/neteq/dsp_helper.h" |
| |
| #include "testing/gtest/include/gtest/gtest.h" |
| #include "webrtc/modules/audio_coding/neteq/audio_multi_vector.h" |
| #include "webrtc/typedefs.h" |
| |
| namespace webrtc { |
| |
| TEST(DspHelper, RampSignalArray) { |
| static const int kLen = 100; |
| int16_t input[kLen]; |
| int16_t output[kLen]; |
| // Fill input with 1000. |
| for (int i = 0; i < kLen; ++i) { |
| input[i] = 1000; |
| } |
| int start_factor = 0; |
| // Ramp from 0 to 1 (in Q14) over the array. Note that |increment| is in Q20, |
| // while the factor is in Q14, hence the shift by 6. |
| int increment = (16384 << 6) / kLen; |
| |
| // Test first method. |
| int stop_factor = DspHelper::RampSignal(input, kLen, start_factor, increment, |
| output); |
| EXPECT_EQ(16383, stop_factor); // Almost reach 1 in Q14. |
| for (int i = 0; i < kLen; ++i) { |
| EXPECT_EQ(1000 * i / kLen, output[i]); |
| } |
| |
| // Test second method. (Note that this modifies |input|.) |
| stop_factor = DspHelper::RampSignal(input, kLen, start_factor, increment); |
| EXPECT_EQ(16383, stop_factor); // Almost reach 1 in Q14. |
| for (int i = 0; i < kLen; ++i) { |
| EXPECT_EQ(1000 * i / kLen, input[i]); |
| } |
| } |
| |
| TEST(DspHelper, RampSignalAudioMultiVector) { |
| static const int kLen = 100; |
| static const int kChannels = 5; |
| AudioMultiVector input(kChannels, kLen * 3); |
| // Fill input with 1000. |
| for (int i = 0; i < kLen * 3; ++i) { |
| for (int channel = 0; channel < kChannels; ++channel) { |
| input[channel][i] = 1000; |
| } |
| } |
| // We want to start ramping at |start_index| and keep ramping for |kLen| |
| // samples. |
| int start_index = kLen; |
| int start_factor = 0; |
| // Ramp from 0 to 1 (in Q14) in |kLen| samples. Note that |increment| is in |
| // Q20, while the factor is in Q14, hence the shift by 6. |
| int increment = (16384 << 6) / kLen; |
| |
| int stop_factor = DspHelper::RampSignal(&input, start_index, kLen, |
| start_factor, increment); |
| EXPECT_EQ(16383, stop_factor); // Almost reach 1 in Q14. |
| // Verify that the first |kLen| samples are left untouched. |
| int i; |
| for (i = 0; i < kLen; ++i) { |
| for (int channel = 0; channel < kChannels; ++channel) { |
| EXPECT_EQ(1000, input[channel][i]); |
| } |
| } |
| // Verify that the next block of |kLen| samples are ramped. |
| for (; i < 2 * kLen; ++i) { |
| for (int channel = 0; channel < kChannels; ++channel) { |
| EXPECT_EQ(1000 * (i - kLen) / kLen, input[channel][i]); |
| } |
| } |
| // Verify the last |kLen| samples are left untouched. |
| for (; i < 3 * kLen; ++i) { |
| for (int channel = 0; channel < kChannels; ++channel) { |
| EXPECT_EQ(1000, input[channel][i]); |
| } |
| } |
| } |
| } // namespace webrtc |